Distributed energy storage off-grid operation control method and system based on multi-machine parallel connection

By building the mathematical model and overall topological structure of the energy storage converter, optimizing control parameters and dynamically adjusting the power distribution, the problem of uneven power distribution in parallel operation of the energy storage converter is solved, and the reliability and stability of off-grid operation are improved.

CN119696041AActive Publication Date: 2025-03-25STATE GRID HUBEI ELECTRIC POWER CO LTD +1
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Patent Information

Application Number
CN202411577619.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-06
Publication Date
2025-03-25
Estimated Expiration
2044-11-06

AI Technical Summary

Technical Problem

In the prior art, multiple energy storage converters are prone to uneven power distribution when they are operated in parallel, resulting in failure of some energy storage converters, which in turn leads to low reliability of off-grid operation.

Method used

By obtaining the operating parameters of multiple energy storage converters in a distributed energy storage off-grid system, a mathematical model of each energy storage converter is constructed, and the overall topology structure is constructed by combining multiple energy storage converters and connected load structures, optimizing control parameters, and dynamically adjusting the power distribution of energy storage converters.

Benefits of technology

Ensure efficient parallel operation of multiple energy storage converters, avoid unbalanced power distribution, and improve the reliability and stability of off-grid operation.

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Abstract

The invention relates to the technical field of power grid systems, and discloses a distributed energy storage off-grid operation control method and system based on multi-machine parallel connection, and the method comprises the steps: obtaining the operation parameters of each energy storage converter, constructing different mathematical models, and constructing an overall topological structure in combination with a connected load structure, therefore, control parameters of a mathematical model corresponding to each energy storage converter are optimized, efficient parallel operation of the multiple energy storage converters can be ensured, then a load sharing strategy is introduced, load information corresponding to each energy storage converter is acquired in real time, the power demand of each load in different application scenes can be known globally, and the power demand of each load in different application scenes can be acquired in real time. According to the load requirement and the operation state of the energy storage converter, the power distribution can be dynamically adjusted, so that the distributed energy storage off-grid system can stably operate under various working conditions, the condition of unbalanced power distribution is avoided, and the reliability of parallel off-grid operation is improved.
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